It's a tank, Mick. Surely they taught you what a tank was when you were in the RAAF?! :P

Seriously, it was an experimental derivative of the Soviet T-10 Heavy Tank of the early 1950s. The track layout was designed to improve mobility over mud and snow.The hull shape was designed for maximum protection from HEAT rounds. It's a one-off design.

You can laugh all you want, but did you ever think that maybe someone's relative designed that? Huh? Well, someone's relative did design it, and all Uncle Boris got for it was grief from the Kremlin. Everywhere he went, some party apparatchik would yell "hey, Boris! How's the tank?" and make rude noises accompanied by obscene gestures. As if they knew anything about designing a tank for heavy snow and heat round survivability. Commie a-holes, all of them.